The study looked at 3-month-old twins and found that the twin who was more enthusiastic about food and took longer to get full gained 2 pounds more than the less enthusiastic twin by age 15 months.

Dietician Tanya Zuckerbrot says one in three children is overweight or obese. She says there are recommended guidelines for what infants need to consume and that just because a baby is crying doesn’t mean he or she is hungry.